标题: BS EN 16272-1-2012 [打印本页] 作者: ygs67 时间: 2016-8-29 11:45:46 标题: BS EN 16272-1-2012
BS EN 16272-1-2012 Railway applications. Track. Noise barriers and related devices acting on airborne sound propagation. Test method for determining the acoustic performance. Intrinsic characteristics. Sound absorption in the laboratory under diffuse sound field conditions 作者: admin 时间: 2016-8-29 16:09:00